“These concerns include the growing prevalence of e-cigarette use among youth, their addictiveness due to nicotine delivery comparable to conventional cigarettes, the toxicity of nicotine and its significant risk of adverse effects on pregnant women and the still developing adolescent brain, the divergence of actual nicotine content from labeled content, the inhalation risks of certain e-liquid ingredients, including certain flavorings, the risk of battery explosion and resulting injury, and the potential harm to nonusers of secondhand aerosol containing nicotine.”